Brewster is a city in Thomas County, Kansas, United States. As of the 2010 census, the city population was 305.
Brewster is located at 39°21′46″N 101°22′36″W / 39.362878°N 101.376552°W / 39.362878; -101.376552 (39.362878, -101.376552). According to the United States Census Bureau, the city has a total area of 0.2 square miles (0.6 km2), all of it land.
As of the census of 2000, there were 285 people, 115 households, and 81 families residing in the city. The population density was 1,131.2 people per square mile (440.2/km2). There were 136 housing units at an average density of 539.8 per square mile (210.0/km2). The racial makeup of the city was 95.44% White, 2.46% from other races, and 2.11% from two or more races. Hispanic or Latino of any race were 4.56% of the population.